DENVER, Colorado (CNN) -- Sen. Barack Obama, the Democrats' presidential nominee, took the stage at the Democratic National Convention Wednesday night, marking his first appearance at the event.

Sen. Joe Biden and Sen. Barack Obama make their first joint appearance at the Democratic convention.

"I think the convention's gone pretty well so far -- what do you think?" he asked of the cheering crowd that, hours earlier, had made him the first African-American candidate to lead a major party White House ticket.

He also praised his running mate, Sen. Joe Biden, as well as Sen. Hillary Clinton and former President Bill Clinton.